Vietnamese Population in Orange County, CA by City : 2025 Ranking & Insights

The Vietnamese population in Orange County, CA is recorded at 240,511 residents, based on the latest U.S. Census estimates. Each city in Orange County, CA has some Vietnamese population, but the county''s higher total suggests additional rural or non-municipal representation. The analysis below explores how Vietnamese communities are spread across Orange County, CA and comparable counties throughout California.

Top 5 cities with the largest Vietnamese population in Orange County

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  • 1
    Garden Grove
    Vietnamese population in Garden Grove is 57,377
    33.63% of Garden Grove population is Vietnamese
  • 2
    Westminster
    Vietnamese population in Westminster is 41,041
    45.53% of Westminster population is Vietnamese
  • 3
    Santa Ana
    Vietnamese population in Santa Ana is 25,165
    8.08% of Santa Ana population is Vietnamese
  • 4
    Anaheim
    Vietnamese population in Anaheim is 23,658
    6.87% of Anaheim population is Vietnamese
  • 5
    Irvine
    Vietnamese population in Irvine is 15,505
    5.03% of Irvine population is Vietnamese

Overview of Vietnamese population in Orange County

  • Population Count and Percentage: American Community Survey data shows Orange County contains 240,511 Vietnamese residents (7.6% of 3.2 million total county population), ranking the jurisdiction at the 100th percentile nationally among counties and 98th percentile within California for Vietnamese demographic concentrations across both absolute and proportional measures.
  • Comparison to State and National Averages: Census Bureau's ACS show Orange County's Vietnamese population of 7.6% surpassing both California's state average of 2.1% and the national average of 0.68%, positioning the county as a high-concentration jurisdiction exceeding demographic benchmarks across all geographic scales.
  • Share of Total State Population: Official American Community Survey indicate Orange County's 240,511 Vietnamese residents constitute 29.7% of California's total Vietnamese population of 811,048, placing the county among jurisdictions with the highest demographic concentrations, with 29.7% of all California Vietnamese Americans residing within county boundaries.
  • Population Density per Square Mile: U.S. Census Bureau's American Community Survey indicate Orange County contains $dem_per_sqmi Vietnamese Americans per square mile—fifty-eight and one-quarter times California's average of 5.2 per square mile—placing the county as a demographic outlier with one of the most concentrated Vietnamese communities documented in United States demographic research.
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34 Cities in Orange County Ranked by Vietnamese Population

View Methodology
ACS data [1] confirm Vietnamese populations in every incorporated city in the county, with the largest counts in Garden Grove, Westminster, Santa Ana, and Anaheim. The table below provides detailed figures, including total population, density measures, and demographic distributions, based on the current ACS data for all 34 incorporated cities included in this analysis*.
cities in Orange County, CA ranked by Vietnamese population count
Rank by Vietnamese Population
City
Vietnamese Population
% of Total City Population
% of Total Orange County Vietnamese Population
5 Year Rank Trend
1 Garden Grove 57,377 33.63% 23.86%
2 Westminster 41,041 45.53% 17.06%
3 Santa Ana 25,165 8.08% 10.46%
4 Anaheim 23,658 6.87% 9.84%
5 Irvine 15,505 5.03% 6.45%
6 Fountain Valley 14,757 26.18% 6.14%
7 Huntington Beach 11,629 5.93% 4.84%
8 7,539 19.51% 3.13%
9 5,504 3.97% 2.29%
10 3,547 3.21% 1.47%
11 3,428 3.99% 1.43%
12 3,323 3.60% 1.38%
13 3,070 2.17% 1.28%
14 3,065 3.88% 1.27%
15 2,133 4.31% 0.89%
16 1,704 2.05% 0.71%
17 1,656 2.46% 0.69%
18 1,244 2.37% 0.52%
19 1,160 1.81% 0.48%
20 1,058 3.42% 0.44%
21 995 1.18% 0.41%
22 891 1.89% 0.37%
23 869 1.69% 0.36%
24 547 1.16% 0.23%
25 450 0.72% 0.19%
26 435 2.83% 0.18%
27 303 0.48% 0.13%
28 288 1.16% 0.12%
29 215 0.65% 0.09%
30 195 3.38% 0.08%
31 181 1.54% 0.08%
32 154 0.44% 0.06%
33 30 0.13% 0.01%
34 23 0.13% 0.01%
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Methodology

This ranking list is based on data from the American Community Survey (ACS) 5-Year Estimates, conducted by the U.S. Census Bureau. The ACS is one of the most reliable sources for understanding population trends across different locations, and it provides estimates for various racial and ethnic groups at city, county, state and all geography levels down to the Census block group.
This list ranks city in Orange County, CA by their Vietnamese population, using the most recent ACS data available.

How the Census defines Vietnamese population

The U.S. Census Bureau allows people to self-identify their ancestry, meaning individuals can write upto ancestries when responding to the survey. In this ranking, we include everyone who identifies as having Vietnamese ancestry, whether alone or in combination with another ancestry.
Here are a few important things to know about how ancestry is reported:
  • Some people identify as Vietnamese alone, while others identify as Vietnamese along with another race (such as Vietnamese and German).
  • We’ve used the “Vietnamese alone or in any combination” category unless noted otherwise, which gives a broader picture of the Vietnamese population in each area.

How We Ranked the Data

This ranking is based on the total number of people who identified as Vietnamese alone or in combination in city. To provide additional context, we’ve also included two key percentages:
  1. % of Total City Population – This shows what percentage of the total state population identifies as Vietnamese .
  2. % of Total Orange County Vietnamese Population – This tells us how much of the entire U.S. Vietnamese population lives in that state.
To keep things simple, all population numbers have been rounded to the nearest whole number, and percentages are rounded to one decimal place. Because of rounding, some percentages may not add up to exactly 100%.

Things to Keep in Mind

Like all survey-based data, ACS estimates come with some limitations. Here are a few things to be aware of:
  • In places with very small Vietnamese populations, the numbers may not be reported at all due to privacy protections or sampling variability in the survey.
  • Since the ACS is based on a sample, the numbers are estimates, not exact counts. That means they may slightly differ from other sources like the decennial U.S. Census.
  • City that don’t have any reported Vietnamese population are not included in the ranking but are listed separately below for reference.
This ranking is meant to provide a clear, data-driven look at where Vietnamese populations are most concentrated while keeping the numbers easy to understand.

Sources

  1. 2019-2023 5-Year Estimates.
  2. 2023.